article: Kitesurfing as a water sport began in the 1980s, but didn't get popular until the end of last century. It is also known as kiteboarding, and in some European countries as flysurfing. Kitesurfing works through wind power  by using a large kite to pull a rider on the water at high speed.
  At first, kitesurfing was a difficult and dangerous sport. Now it is becoming easier and safer because of the safer kite design. For an able and strong person, kitesurfing can be a very fun, extremely exciting sport, just like skating on the water with a feeling of flying. It has become more and more popular.
  Compared with other water sports, kitesurfing is easier to learn. A beginner can understand how to operate the kite with 5--10 hours of training. And anybody aged from 13 to 65 can learn. It is not expensive to get the equipment for kitesurfing, which costs $1,000 to 82,500. Training lessons _ from $200 to $500 for two or three hours. With the development of its equipment progress, kitesurfing is becoming even safer. After some training, you can enjoy its excitement and challenging feeling.
  With the rising popularity of kitesurfing, most major seaside cities have kitesurfing clubs. In China, Xiamen is the only place that has the kitesurfing club, which provides professional kitesurfing training and equipments.
question: The main idea of this passage is about   _  .
options: the way of operating kitesurfing the progress of kitesurfing equipment the history of kitesurfing in China the development of kitesurfing